\begin{tikzpicture}
	\pgfmathsetmacro{\r}{2}
	\tkzDefPoints{0/0/O, -\r/0/A, \r/0/B}
	\tkzDefPoint(58:\r){D}
	\tkzDefPoint(107:\r){C}

	\tkzDrawSegments(O,A  O,B  O,C  O,D)
	\tkzLabelPoints[below](A, O, B)
	\tkzLabelPoints[left](C)
	\tkzLabelPoints[right](D)
\end{tikzpicture}

